GRAYS RIVER HATCHERY, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 47.5 50.6 54.2 58.2 63.3 67.4 72.6 73.8 71.5 62.6 52.3 47.1 60.1
Highest Mean Max. Temperature (F) 54.6 57.2 61.7 63.0 70.4 72.0 78.5 78.0 78.8 69.5 58.2 51.1 78.8
Year Highest Occurred 1981 1991 1992 1989 1992 1992 1996 1981 1974 1987 1976 1979 1974
Lowest Mean Max. Temperature (F) 42.3 43.2 48.5 52.1 58.1 61.7 66.3 68.1 66.5 56.5 43.4 39.7 39.7
Year Lowest Occurred 1972 1989 1971 1972 1974 1971 1993 1980 1986 1984 1985 1990 1990
Mean Temperature (F) 40.6 42.6 45.0 48.1 52.9 57.1 61.3 61.8 58.8 51.7 44.9 40.8 50.5
Highest Mean Temperature (F) 45.7 48.2 49.6 50.9 56.8 60.7 64.2 64.9 62.4 55.2 48.4 45.9 64.9
Year Highest Occurred 1981 1991 1992 1989 1993 1992 1996 1981 1995 1988 1995 1979 1981
Lowest Mean Temperature (F) 33.4 34.7 40.9 43.3 49.0 54.0 58.8 58.0 55.8 48.1 36.6 34.2 33.4
Year Lowest Occurred 1979 1989 1976 1975 1974 1976 1986 1973 1972 1984 1985 1990 1979
Mean Min. Temperature (F) 33.7 34.5 35.7 37.9 42.5 46.7 49.9 49.7 46.1 40.8 37.4 34.5 40.8
Highest Mean Min. Temperature (F) 38.8 39.6 39.8 41.2 46.7 49.3 54.6 52.3 51.1 46.2 41.4 40.7 54.6
Year Highest Occurred 1983 1983 1983 1990 1993 1992 1998 1977 1995 1988 1999 1979 1998
Lowest Mean Min. Temperature (F) 24.3 26.1 31.0 32.6 39.1 43.2 45.4 44.7 42.1 36.4 29.7 28.6 24.3
Year Lowest Occurred 1979 1989 1975 1975 1977 1976 1984 1984 1999 1983 1985 1990 1979
Mean Precipitation (in.) 15.71 13.21 11.88 7.96 5.11 3.90 1.98 2.24 4.25 9.36 16.31 17.49 109.40
Highest Precipitation (in.) 26.72 29.47 25.77 15.56 9.98 7.90 6.79 5.61 11.18 25.42 29.26 32.69 32.69
Year Highest Occurred 1990 1999 1997 1996 1984 1981 1983 1977 1997 1975 1983 1975 1975
Lowest Precipitation (in.) 1.27 1.24 1.23 2.68 0.78 0.92 0.00 0.23 0.06 0.61 3.76 5.33 0.00
Year Lowest Occurred 1985 1993 1992 1977 1992 1987 1984 1998 1993 1987 1976 1985 1984
Heating Degree Days (F) 756. 628. 621. 509. 375. 239. 130. 121. 197. 413. 604. 750. 5343.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 1. 13. 20. 10. 0. 0. 0. 44.

Western Regional Climate Center, wrcc@dri.edu